Yasuo's windwall

Bug or just unfair reality? This has been really frustrating for me. I play Lux and Nami very often and unfortunately have to go against Yasuo a majority of the time. I understand his windwall blocks all projectiles but what is SUPER frustrating is when I throw some kind of cc at Yasuo, I SEE IT HIM HIM, and he throws his windwall a split second after he gets hit and somehow stops the ability entirely. Ex: I am Lux. Yasuo is hardcore chasing me. He is literally RIGHT BEHIND ME, like he can easily basic attack me but he is clearly trying to keep up with me. So I throw my snare. Can you imagine the kind of reaction time he would need to throw his windwall and block my snare when he is basically breathing down my neck? Basically he would of had to luckily guess and throw the ability the exact same time I did. But it wasn't that case because I literally watched him get snared and then throw the windwall to cancel it. This happened OVER AND OVER AND OVER. Games with Yasuo make you feel like you are in prison and can't escape the constant rape. Forever dashing, 100% crit, unbelievably broken wall=just kill yourself before he does.